There are various reasons for patients to grind their teeth, which cannot be generalized. The patient is in a long-term anxiety, depression, tension and other situations, will appear grinding teeth, lip shaking and other abnormal performance, at this time do not need to worry too much, after removing the bad trigger, the symptoms will disappear on their own. In addition, it may also be caused by dental bite disorder, central nervous system abnormalities, gastrointestinal diseases, which need to be treated according to different situations. 1, dental bite disorder: mainly due to the patient’s teeth misalignment, multiple births, etc., resulting in dental bite disorder, often accompanied by unconscious grinding of teeth at night after falling asleep. Patients in need can go to the hospital for orthodontic treatment to improve the dental bite disorder, so as to relieve the symptoms of teeth grinding; 2, central nervous abnormalities: medically, grinding teeth at night is considered the same as sleepwalking and urination, which is a kind of sleep disorder. That is, when the patient sleeps, part of the brain is in a state of awakening, which may cause abnormal secretion of dopamine and norepinephrine, stimulating the mouth to appear the symptoms of teeth grinding. Patients can take diazepam, vitamin B1 and other drugs under the guidance of a doctor to improve the quality of sleep, thereby alleviating the grinding of teeth. It is also important to pay more attention in life and maintain a regular work schedule. In addition, such as epilepsy, schizophrenia, Parkinson’s disease and other disease causes can also cause central nervous system disorders, resulting in teeth grinding, it is recommended that systemic treatment according to different diseases; 3, gastrointestinal diseases: intestinal flora imbalance, parasitic infections and other conditions can induce teeth grinding, mainly due to a decline in gastrointestinal digestive function, resulting in food in the gastrointestinal tract for a long time, aggravating the gastrointestinal burden, which in turn can cause patients not Patients can use mosapride, cisapride, domperidone and other drugs to promote gastrointestinal peristalsis, thus reducing the occurrence of teeth grinding symptoms. In addition, teeth grinding may also be related to family genetic factors, but there is no relatively perfect treatment for this kind of condition, daily can be improved through relaxation and good oral hygiene habits.